Home / 80,787.02-121,202.10-71,962.79

Finding the Fourth Proportional to 80,787.02, 121,202.10 and 71,962.79

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Solution

The fourth proportional to 80,787.02, 121,202.10 and 71,962.79 is: 107,963.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,787.02 : 121,202.10 = 71,962.79 : x
  2. Step 2: Convert to fraction form
    80,787.02/121,202.10 = 71,962.79/x
  3. Step 3: Cross multiply
    80,787.02x = 121,202.10 × 71,962.79
  4. Step 4: Simplify right side
    80,787.02x = 8,722,040,663.85
  5. Step 5: Solve for x
    x = 8,722,040,663.85/80,787.02
  6. Step 6: Final answer
    x = 107,963.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.